Definition of haem in English:

haem

(US heme)

noun hiːmhēm

mass nounBiochemistry

An iron-containing compound of the porphyrin class which forms the non-protein part of haemoglobin and some other biological molecules.
Example sentencesExamples
- This turnover releases significant amounts of the iron-free portion of heme, porphyrin, which is subsequently degraded.
- The majority of photosensitizers are derivatives of hematoporphyrin, a synthetic porphyrin synthesized from heme.
- The active site or prosthetic group of all the cytochromes is an iron containing porphyrin, or heme.
- An iron porphyrin, called heme, is the portion of hemoglobin that carries oxygen from the lungs to our body's cells.
- The harvested cell pellet was red, which suggested that the prosthetic group heme was synthesized by the bacterium.

Origin

1920s: back-formation from haemoglobin.

Definition of heme in US English:

heme

(British haem)

nounhēm

Biochemistry

An iron-containing compound of the porphyrin class which forms the nonprotein part of hemoglobin and some other biological molecules.
Example sentencesExamples
- The harvested cell pellet was red, which suggested that the prosthetic group heme was synthesized by the bacterium.
- An iron porphyrin, called heme, is the portion of hemoglobin that carries oxygen from the lungs to our body's cells.
- The majority of photosensitizers are derivatives of hematoporphyrin, a synthetic porphyrin synthesized from heme.
- The active site or prosthetic group of all the cytochromes is an iron containing porphyrin, or heme.
- This turnover releases significant amounts of the iron-free portion of heme, porphyrin, which is subsequently degraded.

Origin

1920s: back-formation from hemoglobin.

单词	haem
释义	Definition of haem in English: haem (US heme) noun hiːmhēm mass nounBiochemistry An iron-containing compound of the porphyrin class which forms the non-protein part of haemoglobin and some other biological molecules. Example sentencesExamples This turnover releases significant amounts of the iron-free portion of heme, porphyrin, which is subsequently degraded. The majority of photosensitizers are derivatives of hematoporphyrin, a synthetic porphyrin synthesized from heme. The active site or prosthetic group of all the cytochromes is an iron containing porphyrin, or heme. An iron porphyrin, called heme, is the portion of hemoglobin that carries oxygen from the lungs to our body's cells. The harvested cell pellet was red, which suggested that the prosthetic group heme was synthesized by the bacterium. Origin 1920s: back-formation from haemoglobin. Definition of heme in US English: heme (British haem) nounhēm Biochemistry An iron-containing compound of the porphyrin class which forms the nonprotein part of hemoglobin and some other biological molecules. Example sentencesExamples The harvested cell pellet was red, which suggested that the prosthetic group heme was synthesized by the bacterium. An iron porphyrin, called heme, is the portion of hemoglobin that carries oxygen from the lungs to our body's cells. The majority of photosensitizers are derivatives of hematoporphyrin, a synthetic porphyrin synthesized from heme. The active site or prosthetic group of all the cytochromes is an iron containing porphyrin, or heme. This turnover releases significant amounts of the iron-free portion of heme, porphyrin, which is subsequently degraded. Origin 1920s: back-formation from hemoglobin.
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